/*
 * 802.1Q VLAN protocol definitions
 *
 * Copyright (C) 1999-2019, Broadcom.
 *
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 *
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module which is
 * not derived from this software.  The special exception does not apply to any
 * modifications of the software.
 *
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 *
 * <<Broadcom-WL-IPTag/Open:>>
 *
 * $Id: vlan.h 700076 2017-05-17 14:42:22Z $
 */

#ifndef _vlan_h_
#define _vlan_h_

#ifndef _TYPEDEFS_H_
#include <typedefs.h>
#endif // endif

/* This marks the start of a packed structure section. */
#include <packed_section_start.h>

#ifndef VLAN_VID_MASK
#define VLAN_VID_MASK 0xfff /* low 12 bits are vlan id */
#endif                      // endif

#define VLAN_CFI_SHIFT 12 /* canonical format indicator bit */
#define VLAN_PRI_SHIFT 13 /* user priority */

#define VLAN_PRI_MASK 7 /* 3 bits of priority */

#define VLAN_TPID_OFFSET 12 /* offset of tag protocol id field */
#define VLAN_TCI_OFFSET 14  /* offset of tag ctrl info field */

#define VLAN_TAG_LEN 4
#define VLAN_TAG_OFFSET                                                        \
    (2 * ETHER_ADDR_LEN) /* offset in Ethernet II packet only */

#define VLAN_TPID 0x8100 /* VLAN ethertype/Tag Protocol ID */

struct vlan_header {
    uint16 vlan_type; /* 0x8100 */
    uint16 vlan_tag;  /* priority, cfi and vid */
};

struct ethervlan_header {
    uint8 ether_dhost[ETHER_ADDR_LEN];
    uint8 ether_shost[ETHER_ADDR_LEN];
    uint16 vlan_type; /* 0x8100 */
    uint16 vlan_tag;  /* priority, cfi and vid */
    uint16 ether_type;
};

struct dot3_mac_llc_snapvlan_header {
    uint8 ether_dhost[ETHER_ADDR_LEN]; /* dest mac */
    uint8 ether_shost[ETHER_ADDR_LEN]; /* src mac */
    uint16 length;                     /* frame length incl header */
    uint8 dsap;                        /* always 0xAA */
    uint8 ssap;                        /* always 0xAA */
    uint8 ctl;                         /* always 0x03 */
    uint8 oui[3];                      /* RFC1042: 0x00 0x00 0x00
                                        * Bridge-Tunnel: 0x00 0x00 0xF8
                                        */
    uint16 vlan_type;                  /* 0x8100 */
    uint16 vlan_tag;                   /* priority, cfi and vid */
    uint16 ether_type;                 /* ethertype */
};

#define ETHERVLAN_HDR_LEN (ETHER_HDR_LEN + VLAN_TAG_LEN)

/* This marks the end of a packed structure section. */
#include <packed_section_end.h>

#define ETHERVLAN_MOVE_HDR(d, s)                                               \
    do {                                                                       \
        struct ethervlan_header t;                                             \
        t = *(struct ethervlan_header *)(s);                                   \
        *(struct ethervlan_header *)(d) = t;                                   \
    } while (0)

#endif /* _vlan_h_ */
